Mariah Carey's rep won't confirm that MC is pregnant. But when asked about Mariah dropping out of a Tyler Perry film, said: "She is not doing the movie because her doctor advised her not to." Hmm. [Gatecrasher]

Barbara Walters missed an event honoring Placido Domingo last night, and wrote a letter which was read aloud: "Dear Placido: Only an injured heart would keep me from being with you tonight. You may have heard that I have had recent surgery to replace a faulty heart valve. I am doing very well but not quite ready to jump rope or go out. How I wish I could say these things in person." [ET]

Lady Gaga's show in the UK last night included an episode in which she broke down and cried about her sick, hospitalized grandfather. Later she bathed in an angel fountain spouting blood and got "friendly" with her female dancers. [Daily Mail]

Kirsten Dunst's assistant testified that she had "a little bit of marijuana" in her bag — and that she did not plan on smoking it with Kiki. [NYDN]

Leonardo DiCaprio has teamed up with the World Wildlife Fund to launch Save Tigers Now. In a statement, Leo says: "Tigers are endangered and critical to some of the world's most important ecosystems. Key conservation efforts can save the tiger species from extinction, protect some of the planet's last wild habitats and help sustain the local communities surrounding them. By protecting this iconic species, we can save so much more." [Access Hollywood, Contact Music]

Michael Lohan and Dina Lohan have reached some kind of ceasefire peace agreement! The war is over! [Radar Online]

Betty White was asked if she has advice for Lindsay Lohan, and said: "Shape up!" [Ok!]

M.I.A. is considering raising her son in China: "I want him to learn Chinese, because the next hundred years is about China being a superpower and he should know how to speak it. So maybe he'll go there." [Contact Music]

Is Robert Pattinson a sneaky genius? Seems like the rumors that he was dating Kristen Stewart could have been just to drum up publicity for the Twilight movies. Now that he's working on the film Water For Elephants, with Reese Witherspoon, he's telling everyone that he is single and flirting with Reese. [ShowbizSpy]

Janet Jackson got such a great, positive reaction to her appearance on American Idol that she and her cute new haircut might go on tour. [TMZ]

Katherine Heigl might move to Nashville, so her husband, Josh Kelley, can launch his career as a country singer. [Contact Music]

Uh: Jesse James killed baby animals when he was a teenager? [Radar Online]

Sandra Bullock has been staying at the Beverly Hills Hotel and managing to avoid the paparazzi: "She's become the greatest celebrity Houdini," one photographer says. [Radar Online]

Behold: The priceless work of art that is Pauly D's motorcycle. [Radar Online]

Set your DVRs: ABC will air a one-hour concert special called Miley Cyrus: Live From London on June 18. [ONTD]

Casey Affleck says his documentary film about Joaquin Phoenix is a "true portrait" — in other words, not a spoof. Of course, you would say that if you were trying to trick people into thinking your mockumentary was real. [Mirror]

"Kendra Wilkinson: Did Playboy Star Plan Release Of Sex Tape To Cash In On Sales?" Signs point to yes. [Daily Mail]

"A high-profile investment banker to stars including Martin Scorsese, Wesley Snipes and Uma Thurman, has been arrested on suspicion of defrauding his clients, allegedly cheating them out of a staggering £20 million." [Daily Express]

What the world needs now: Kristin Cavallari plans on writing a tell-all book. [In Touch]

"Prosecutors in the Bruce Beresford-Redman case want the former Survivor producer charged with first degree murder." [TMZ]

The Backstreet Boys have left Jive Records after 16 years on the label. [JustJared]

Da Brat is out of prison on work-release and her temporary job is making windows. [ONTD]

"Jesse should have been in therapy years ago. I'm so sad because he's such a sweet guy. And when he starts telling you about what he came out of with his background you put two and two together. So you just hope, please God, get into therapy, which he is and try and pull your life together. [When I first met him] I thought he was adorable, ADORABLE. Jesse was a darling and a gentleman. He was the one who carried your bag, he was the one who helped you up the stairs. Sweet, nice … this whole thing is just insane." — Joan Rivers. [Hollywood Life]

"There are a few things I can't do any more. I don't want to work in the snow. I don't want to work on the water. I don't want to work in the desert. And I don't want to work in musical comedy. I really suck at all those things. I'm really crabby when I'm uncomfortable or I get some sand in my shorts." — Bruce Willis. [Daily Express]

"Katy is sexy, which is good because if I don't have an orgasm every 15 or 16 minutes, I can become very difficult. But, if she's going to marry me, she's going to learn how to cook." — Russell Brand. [Contact Music]

"People think I'm vain because I look in mirrors so much, but I'm not looking in mirrors, thinking, 'Look at you, you hunk.' I'm just checking to see if I'm still there" — Russell Brand. [Page Six via Rolling Stone]

"Prince makes me so mad. I like Prince but he does this thing, like, he doesn't wanna play any of his hits and so he does, like, these two-hour jazz interludes, where it's just the band and he, like, goes off to the side. I wanna see Prince, I want you to sing Purple Rain, I want you to do, like, the songs that I know and like. John Mayer plays My Body is a Wonderland when you go to his concerts and I feel like he's singing to me... Play the good songs." — Ashton Kutcher. Feeling entitled, are we? [Contact Music]

"I don't like the new trends in horror. All this torture stuff seems really mean-spirited. People have forgotten how to laugh, and I don't see anybody who's using it as allegory. The guy I love right now is Guillermo del Toro. I'd love to make a film like Pan's Labyrinth." — legendary director George Romero, of Night of the Living Dead fame. [Time]

Q: Do zombies have an expiration date? George Romero: "I hope that my guys don't have an expiration date. My zombies will never take over the world because I need the humans. The humans are the ones I dislike the most, and they're where the trouble really lies. The zombies are just [swats at the air] mosquitoes." [Time]

"This Nicole Pussycat person won. Imagine that? A professional dancer won Dancing With the Stars. This is why I do not watch it anymore." — Gilles Marini. [Page Six]

"We all have the same issues. Every woman. It's thighs, butt, arms, muffintops. All those fun things, we all have the same issues." — Heidi Klum. [Showbiz Spy]